Web Cleaner Mote Knife Gauge / Neps & Trash

July 5th, 2015

A neps and trash indicator

It’s been a while since we featured a study about neps and trash. Here’s one:

Effect of Web Cleaner Mote Knife Gauge on Neps and Trash“, Yu Xuezhi Sun Pengzi. Cotton Textile Technology, February 2008. The authors, at Liaoning Liaodong University, China, explain:

“To study the effect of web cleaner mote knife gauge on removing neps and trash in card sliver, USTER AFIS single fibre tester was adopted, neps and trash in card sliver that was produced in condition of two kinds of suction form,two kinds of air capacity and three kinds of mote knife gauge were tested.The result shows that when using unilateral suction and mote knife gauge is 0.53 mm, the effect of removing neps and trash is better.”

About you and about notes on a disturbing error

July 4th, 2015

If you are a person of a certain sensibility you will enjoy reading Professor Richard Montgomery‘s “Notes on a disturbing error found in the book Sub-Riemannian Geometry — general theory and examples by Calin and Chang.

And if you aren’t, you won’t.

Montgomery is enamored also of thinking about the Dzhanibekova effect (which some people prefer to call “the tennis racket effect” or “the tennis racket theorem“), which is on display in this video:

As someone or other described it in words: “a rigid body is rotating around the axis and then SUDDENLY the rotation axis CHANGES ITS POSITION by 180 degrees. And this happens periodically with some time period.”

Ig Nobel winner’s damn!’s-good book on bad behavior

July 3rd, 2015

Richard Stephens, who was awarded the 2010 Ig Nobel peace prize for demonstrating that swearing helps relieve pain, has written a book about the good sides of bad behavior.

The book, to which I delightedly contributed a cover blurb (‘Richard Stephens demonstrates that the bad (“NEVER DO THAT!”) things in life do have their good, practical side’), is called Black Sheep: The Hidden Benefits of Being Bad. The publisher produced this wicked little video about it:

Caroline Morley wrote an admiring book review, in New Scientist magazine, that begins:

WHETHER it’s skiving, sex, speeding or drinking alcohol, everything fun seems to have a warning attached. So why does behaving badly feel so good?

Richard Stephens, a senior lecturer in psychology at Keele University, UK, may not sound like the obvious person to tackle the science of deviance until you discover that he has won an Ig Nobel prize for his work on swearing. And since swearing is a particular vice of mine, I was keen to read about any advantages fruity language might confer.

In Black Sheep, Stephens ranges far and wide, surveying the psychological and physiological research into our character flaws. He writes with the glee of someone at a theme park, which is fitting since he tells us that a ride on a roller coaster is beneficial for asthma….

Attracting Wildlife – for research (or shooting) [new patent]

July 3rd, 2015

Inventor Harrison Forrester, from Greenwood, SC, USA, has just received a patent for a wildlife attractor device which may help scientific researchers (or hunters),


“The present invention is related to a hunting device that is particularly suitable for attracting wildlife and animals, such as deer, antelope, and varmints to a particular location.”


The device, which can be strapped to a tree as shown, has, if required, a remote controlled tail-wagging function.

“Attracting wildlife and animals such as deer to a particular location has many benefits. For example, attracting wildlife to a particular location can aid scientists with their studies on a particular wildlife’s migratory patterns.”

Or, alternatively, it can

“[…] allow a hunter enough time to aim and discharge his weapon.”

See:Wildlife Attractor Device’ (US Pat., May 26, 2015)


Ig Nobel ceremony tickets go on sale July 9

July 3rd, 2015

Tickets for the 25th First Annual Ig Nobel Prize ceremony will go on sale THURSDAY, JULY 9, 2015, at NOON (Boston time). Tickets will be available exclusively from the Harvard Box Office.



Tickets alway disappear quickly. This being a big year — our 25th! — we expect them to disappear especially quickly. So prepare!